Instanton approach to the decay of a metastable quantum state

Autor:	Alsina Bolívar, Pol
Přispěvatelé:	Bulashenko, Oleg
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Quantum state Bachelor's thesis Estat quàntic Tunneling (Physics) Bachelor's theses Efecte túnel Treballs de fi de grau
Zdroj:	Dipòsit Digital de la UB Universidad de Barcelona
Popis:	Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2021, Tutor: Oleg Bulashenko The escape transition due to quantum tunnelling of a particle from a metastable region, created by a cubic potential, is studied. Finding this amplitude is reduced to the computation of a Feynman path integral. This calculus has been carried out using the instanton method, which demands to rotate the time coordinate along the imaginary plane. The results obtained show that the ground state energy has actually an imaginary part (fact that is actually related to the metastability of the system) and allows to find the decaying rate of the metastable state
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::46d92375b4e8da50b7dac8e2343de8aa http://hdl.handle.net/2445/180590 Zobrazit plný text záznamu